Definition of "oil-tight" [oil-tight]

• In constructive mechanics, noting a degree of tightness in joints, etc., that will prevent oil from flowing through between the juxtaposed surfaces.

The Century Dictionary (Public Domain)

• "There is no need to stop driving your van, but stop washing it: make sure that it is oil-tight and that used oil is burnt rather than poured away as half the spilled oil on the ocean comes down the sewers."
• "Sealed oil-tight by just their careful craftsmanship and the security of these bolts."
• "The ANC makes a special appeal to all oil-producing States to join in the embargo already imposed by OAPEC (5) and OPEC (6) members and others, and further to take effective legislative and administrative measures to ensure that their embargoes are watertight - or should I say oil-tight."